有没有人用过RTT的MD5文件校验？

发布于 2021-11-12 08:59:59 浏览：1338 订阅该版

3 个回答

出出啊 2021-11-12

恃人不如自恃，人之为己者不如己之自为也

cxhxy12345 2021-11-12

这家伙很懒，什么也没写！

AXNG 2022-12-24

这家伙很懒，什么也没写！

```c

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <rtthread.h>
#include <finsh.h>
#include "dfs_posix.h"
#include "utils_md5.h"

/* Implementation that should never be optimized out by the compiler */
static void _utils_md5_zeroize(void *v, size_t n)
{
  volatile unsigned char *p = v;
  while (n--) *p++ = 0;
}

static int8_t utils_hb2hex(uint8_t hb)
{
  hb = hb & 0xF;
  return (int8_t)(hb < 10 ? '0' + hb : hb - 10 + 'a');
}

/*
* 32-bit integer manipulation macros (little endian)
*/
#ifndef IOT_MD5_GET_UINT32_LE
#define IOT_MD5_GET_UINT32_LE(n,b,i)                            \
{                                                       \
  (n) = ( (uint32_t) (b)[(i)    ]       )             \
    | ( (uint32_t) (b)[(i) + 1] <<  8 )             \
      | ( (uint32_t) (b)[(i) + 2] << 16 )             \
        | ( (uint32_t) (b)[(i) + 3] << 24 );            \
}
#endif

#ifndef IOT_MD5_PUT_UINT32_LE
#define IOT_MD5_PUT_UINT32_LE(n,b,i)                                    \
{                                                               \
  (b)[(i)    ] = (unsigned char) ( ( (n)       ) & 0xFF );    \
    (b)[(i) + 1] = (unsigned char) ( ( (n) >>  8 ) & 0xFF );    \
      (b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF );    \
        (b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF );    \
}
#endif

void utils_md5_init(iot_md5_context *ctx)
{
  memset(ctx, 0, sizeof(iot_md5_context));
}

void utils_md5_free(iot_md5_context *ctx)
{
  if (ctx == NULL) {
    return;
  }
  
  _utils_md5_zeroize(ctx, sizeof(iot_md5_context));
}

void utils_md5_clone(iot_md5_context *dst,
                     const iot_md5_context *src)
{
  *dst = *src;
}

/*
* MD5 context setup
*/
void utils_md5_starts(iot_md5_context *ctx)
{
  ctx->total[0] = 0;
  ctx->total[1] = 0;
  
  ctx->state[0] = 0x67452301;
  ctx->state[1] = 0xEFCDAB89;
  ctx->state[2] = 0x98BADCFE;
  ctx->state[3] = 0x10325476;
}

void utils_md5_process(iot_md5_context *ctx, const unsigned char data[64])
{
  uint32_t X[16], A, B, C, D;
  
  IOT_MD5_GET_UINT32_LE(X[ 0], data,  0);
  IOT_MD5_GET_UINT32_LE(X[ 1], data,  4);
  IOT_MD5_GET_UINT32_LE(X[ 2], data,  8);
  IOT_MD5_GET_UINT32_LE(X[ 3], data, 12);
  IOT_MD5_GET_UINT32_LE(X[ 4], data, 16);
  IOT_MD5_GET_UINT32_LE(X[ 5], data, 20);
  IOT_MD5_GET_UINT32_LE(X[ 6], data, 24);
  IOT_MD5_GET_UINT32_LE(X[ 7], data, 28);
  IOT_MD5_GET_UINT32_LE(X[ 8], data, 32);
  IOT_MD5_GET_UINT32_LE(X[ 9], data, 36);
  IOT_MD5_GET_UINT32_LE(X[10], data, 40);
  IOT_MD5_GET_UINT32_LE(X[11], data, 44);
  IOT_MD5_GET_UINT32_LE(X[12], data, 48);
  IOT_MD5_GET_UINT32_LE(X[13], data, 52);
  IOT_MD5_GET_UINT32_LE(X[14], data, 56);
  IOT_MD5_GET_UINT32_LE(X[15], data, 60);
  
#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
  
#define P(a,b,c,d,k,s,t)                                \
  {                                                       \
    a += F(b,c,d) + X[k] + t; a = S(a,s) + b;           \
  }
  
  A = ctx->state[0];
  B = ctx->state[1];
  C = ctx->state[2];
  D = ctx->state[3];
  
#define F(x,y,z) (z ^ (x & (y ^ z)))
  
  P(A, B, C, D,  0,  7, 0xD76AA478);
  P(D, A, B, C,  1, 12, 0xE8C7B756);
  P(C, D, A, B,  2, 17, 0x242070DB);
  P(B, C, D, A,  3, 22, 0xC1BDCEEE);
  P(A, B, C, D,  4,  7, 0xF57C0FAF);
  P(D, A, B, C,  5, 12, 0x4787C62A);
  P(C, D, A, B,  6, 17, 0xA8304613);
  P(B, C, D, A,  7, 22, 0xFD469501);
  P(A, B, C, D,  8,  7, 0x698098D8);
  P(D, A, B, C,  9, 12, 0x8B44F7AF);
  P(C, D, A, B, 10, 17, 0xFFFF5BB1);
  P(B, C, D, A, 11, 22, 0x895CD7BE);
  P(A, B, C, D, 12,  7, 0x6B901122);
  P(D, A, B, C, 13, 12, 0xFD987193);
  P(C, D, A, B, 14, 17, 0xA679438E);
  P(B, C, D, A, 15, 22, 0x49B40821);
  
#undef F
  
#define F(x,y,z) (y ^ (z & (x ^ y)))
  
  P(A, B, C, D,  1,  5, 0xF61E2562);
  P(D, A, B, C,  6,  9, 0xC040B340);
  P(C, D, A, B, 11, 14, 0x265E5A51);
  P(B, C, D, A,  0, 20, 0xE9B6C7AA);
  P(A, B, C, D,  5,  5, 0xD62F105D);
  P(D, A, B, C, 10,  9, 0x02441453);
  P(C, D, A, B, 15, 14, 0xD8A1E681);
  P(B, C, D, A,  4, 20, 0xE7D3FBC8);
  P(A, B, C, D,  9,  5, 0x21E1CDE6);
  P(D, A, B, C, 14,  9, 0xC33707D6);
  P(C, D, A, B,  3, 14, 0xF4D50D87);
  P(B, C, D, A,  8, 20, 0x455A14ED);
  P(A, B, C, D, 13,  5, 0xA9E3E905);
  P(D, A, B, C,  2,  9, 0xFCEFA3F8);
  P(C, D, A, B,  7, 14, 0x676F02D9);
  P(B, C, D, A, 12, 20, 0x8D2A4C8A);
  
#undef F
  
#define F(x,y,z) (x ^ y ^ z)
  
  P(A, B, C, D,  5,  4, 0xFFFA3942);
  P(D, A, B, C,  8, 11, 0x8771F681);
  P(C, D, A, B, 11, 16, 0x6D9D6122);
  P(B, C, D, A, 14, 23, 0xFDE5380C);
  P(A, B, C, D,  1,  4, 0xA4BEEA44);
  P(D, A, B, C,  4, 11, 0x4BDECFA9);
  P(C, D, A, B,  7, 16, 0xF6BB4B60);
  P(B, C, D, A, 10, 23, 0xBEBFBC70);
  P(A, B, C, D, 13,  4, 0x289B7EC6);
  P(D, A, B, C,  0, 11, 0xEAA127FA);
  P(C, D, A, B,  3, 16, 0xD4EF3085);
  P(B, C, D, A,  6, 23, 0x04881D05);
  P(A, B, C, D,  9,  4, 0xD9D4D039);
  P(D, A, B, C, 12, 11, 0xE6DB99E5);
  P(C, D, A, B, 15, 16, 0x1FA27CF8);
  P(B, C, D, A,  2, 23, 0xC4AC5665);
  
#undef F
  
#define F(x,y,z) (y ^ (x | ~z))
  
  P(A, B, C, D,  0,  6, 0xF4292244);
  P(D, A, B, C,  7, 10, 0x432AFF97);
  P(C, D, A, B, 14, 15, 0xAB9423A7);
  P(B, C, D, A,  5, 21, 0xFC93A039);
  P(A, B, C, D, 12,  6, 0x655B59C3);
  P(D, A, B, C,  3, 10, 0x8F0CCC92);
  P(C, D, A, B, 10, 15, 0xFFEFF47D);
  P(B, C, D, A,  1, 21, 0x85845DD1);
  P(A, B, C, D,  8,  6, 0x6FA87E4F);
  P(D, A, B, C, 15, 10, 0xFE2CE6E0);
  P(C, D, A, B,  6, 15, 0xA3014314);
  P(B, C, D, A, 13, 21, 0x4E0811A1);
  P(A, B, C, D,  4,  6, 0xF7537E82);
  P(D, A, B, C, 11, 10, 0xBD3AF235);
  P(C, D, A, B,  2, 15, 0x2AD7D2BB);
  P(B, C, D, A,  9, 21, 0xEB86D391);
  
#undef F
  
  ctx->state[0] += A;
  ctx->state[1] += B;
  ctx->state[2] += C;
  ctx->state[3] += D;
}

/*
* MD5 process buffer
*/
void utils_md5_update(iot_md5_context *ctx, const unsigned char *input, size_t ilen)
{
  size_t fill;
  uint32_t left;
  
  if (ilen == 0) {
    return;
  }
  
  left = ctx->total[0] & 0x3F;
  fill = 64 - left;
  
  ctx->total[0] += (uint32_t) ilen;
  ctx->total[0] &= 0xFFFFFFFF;
  
  if (ctx->total[0] < (uint32_t) ilen) {
    ctx->total[1]++;
  }
  
  if (left && ilen >= fill) {
    memcpy((void *)(ctx->buffer + left), input, fill);
    utils_md5_process(ctx, ctx->buffer);
    input += fill;
    ilen  -= fill;
    left = 0;
  }
  
  while (ilen >= 64) {
    utils_md5_process(ctx, input);
    input += 64;
    ilen  -= 64;
  }
  
  if (ilen > 0) {
    memcpy((void *)(ctx->buffer + left), input, ilen);
  }
}

static const unsigned char iot_md5_padding[64] = {
  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};

/*
* MD5 final digest
*/
void utils_md5_finish(iot_md5_context *ctx, unsigned char output[16])
{
  uint32_t last, padn;
  uint32_t high, low;
  unsigned char msglen[8];
  
  high = (ctx->total[0] >> 29)
    | (ctx->total[1] <<  3);
  low  = (ctx->total[0] <<  3);
  
  IOT_MD5_PUT_UINT32_LE(low,  msglen, 0);
  IOT_MD5_PUT_UINT32_LE(high, msglen, 4);
  
  last = ctx->total[0] & 0x3F;
  padn = (last < 56) ? (56 - last) : (120 - last);
  
  utils_md5_update(ctx, iot_md5_padding, padn);
  utils_md5_update(ctx, msglen, 8);
  
  IOT_MD5_PUT_UINT32_LE(ctx->state[0], output,  0);
  IOT_MD5_PUT_UINT32_LE(ctx->state[1], output,  4);
  IOT_MD5_PUT_UINT32_LE(ctx->state[2], output,  8);
  IOT_MD5_PUT_UINT32_LE(ctx->state[3], output, 12);
}

/*
* output = MD5( input buffer )
*/
void utils_md5(const unsigned char *input, size_t ilen, unsigned char output[MD5_DIGEST_SIZE*2])
{
  unsigned char out[MD5_DIGEST_SIZE];
  int i;
  iot_md5_context ctx;
  
  utils_md5_init(&ctx);
  utils_md5_starts(&ctx);
  utils_md5_update(&ctx, input, ilen);
  utils_md5_finish(&ctx, out); //返回计算出的MD5 需要调用HB2HEX转换成HEX
  utils_md5_free(&ctx);
  
  //将MD5结果转换成HEX
  for (i = 0; i < MD5_DIGEST_SIZE; ++i) {
    output[i * 2] = utils_hb2hex(out[i] >> 4);
    output[i * 2 + 1] = utils_hb2hex(out[i]);
  }
}

/*
* output = MD5( input buffer )
*/

unsigned char msg[1024];
int file_md5(char* fileName , uint8_t* output)
{
  int ret=true;
  iot_md5_context ctx;
  unsigned char out[MD5_DIGEST_SIZE];
  //unsigned char input[1024];
 // unsigned long ilen=0;
  int i;
//  int rc;

unsigned long readByte=0;
  unsigned long readLength=0;
 // unsigned long total_size=0;
  long unReadByte = 0;
   size_t fileSize =0;
	
   fileSize = myFileSize(fileName);
	  int  fd = open(fileName, O_RDONLY) ;
		if(fd <0)
		{
			 rt_kprintf("Open %s Failed\n",fileName);
			return false;
		}
  /* 限制：最大计算0xffffffff / 8 = 536870911字节 */
  if(fileSize> 536870911)
  {
    close(fd);
    return false;
  }
  utils_md5_init(&ctx);
  utils_md5_starts(&ctx); 
  unReadByte = fileSize-MD5_DIGEST_SIZE*2;//文件末尾的32个字符，是追加本文件的MD5值	
  while(unReadByte>0)
  {
    readByte = unReadByte>1024? 1024: unReadByte;
    readLength = read(fd,msg,readByte);
    if(readLength != readByte)
    {
      rt_kprintf("read %s file is fail:%d(%d)\n",fileName,unReadByte,fileSize);
      ret=false;
      utils_md5_free(&ctx);
       close(fd);
      return false;
    }
    else   
    {
      unReadByte = unReadByte - readByte;
      utils_md5_update(&ctx, msg, readByte);
      
    }
  }
  utils_md5_finish(&ctx, out); //返回计算出的MD5 需要调用HB2HEX转换成HEX
  utils_md5_free(&ctx);
  
  //将MD5结果转换成HEX
  for (i = 0; i < MD5_DIGEST_SIZE; ++i) {
    output[i * 2] = utils_hb2hex(out[i] >> 4);
    output[i * 2 + 1] = utils_hb2hex(out[i]);
  }
  close(fd);
  return ret;
}

int checkMD5(char *fileName,char* md5DL)
{
  unsigned char md5OfFile[40];
  memset(md5OfFile,0,sizeof(md5OfFile));
  file_md5(fileName,md5OfFile);// "update.bin"
  rt_kprintf("MD5CL=%s\n",md5OfFile);
  rt_kprintf("MD5DL=%s\n",md5DL);
  if(strcmp(md5DL,(char*)md5OfFile) ==0)
  {
    
    return RT_EOK;
  }
  else
    return RT_ERROR;
}

```